Indicating means for electrically heating flat-irons.



E. GLASS.

lNDlCATlNG MEANS FOR ELECHHGALLY HEATING FLATIRONS.

APPLICATlON FILED um. 12. 1918 1,280,709. I v Patented Oct. 8,1918.

. BSBESTO-S vgwl I? EDWARD L. cuss, or (intense, rntmors.

- mmca'rme arms For. nnno'rarcatny HEATING FLAT-IRONS.

To allwhom it'may concern:

Be it-known that EDWARD L. GLASS, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illmois, has invented certain new and useful Improvements in Indicating Means for Electrically Heating Flat-Irons,'of which the following isa specification, reference being hadto the accompanying drawings.

This invention relates to flat irons, and

particularly to electrically heatedflat irons. The general object of this invention is the provision of means'for indicating in'an electric flat iron whether the current is turned on or oii, Y A. further object is to provide-avery simple mechanism of this character disposed within a casing mounted upon the iron; in

any suitable or convenient manner.

A further object is to provide afdevi'ce'of this character in which a resistance wire is used disposed in series with the heatingelement so that this resistance wire'will glow as long asthe current is passing through it and get cold as'soon as the current is turned ofi. A further object is to eliminate all danger of the resistance wire burning out. X

the dart; and

Other objects will-appear in the course of invent on is i lustratedin the accompanying drawings, wherein Figure 1 is a longitudinal, vertical sectional view. of an electrically heated flat iron embodying the improvementsof my invention;

Fig. 2 1s a horizontal section on. the line 2-2 of Fig.- 1, lookingin' the direction of Fig. 3 is a detailed view of apart hereinafter'describe'd.

Referring to these drawings 10 designates "the casing ofthe flat iron and 11 the base of the flat iron to 'which the casin is attached in any suitable manner, the ass of the fiat iron having above or in any other suitable relation; any suitable resistance;

heating element 12. I do not wish to be limited to the particular form of this heating element as I will merely say that it is a resistance coil properly supported in rela tion to the base of the iron. A handle 13 is attached to the casing in any suitable manner.

Specification of Letters Patent. Application flled' January 12, 1918. Serial No. 211,584.

. ing with the amperage of the iron.

defined by an upwardly 'extendlng rim 15 and by an inwardly extending flange 16. Disposed beneath the flange 16 is a small disk of glass or other transparent material deslgnated 17 and holding this glass in place is a somewhat elliptical or oval disk 18 of \the other of the screws a lead wire 22 extends to the heating element. A lead wire 7 Patented Oct. s, 1918. 1

- through the center of the stamping being brass or other suitable metal havingits-cen- 25'extends back from the heating element to v a second binding screw 23" Connecting the screws 21 and-crossing the space beneath the disk of glass 17 is an indicating wire 24: which is a piece of Nickrone resistance. wire of approximately three inches in length,,the gage of the wire v ali it'ly- 1s wireis connected to the screws 21 and thus is in circuit with the leadwire 22 and the wire 22 leading to the heating'element. Disposed within the casing 10 and above the heating element 12 isaplate or iron 26 Which forms a weight and which is held to the base 12 by means of screws 27 the heads of these screws being held by recesses in the top of the plate 26. Holding the casing 10 to the plate 26 are screws 28 which pass down through the top of the casing 10 and which also hold the legs 29 of the handle 13 to the casing, these legs 29:be'ing-formed by astrip of sheet metal expanding from one handle to the other and bent into U-form and through which the screws 28 pass. Disposed 7 between the top of the casing 10' and the top of theiron plate 26 and around the side faces of the iron plate is asbestos 30. This asbestos is to be packed in solidly so as to 'insu-- Preferably and as shown in Fig. 2. the sight opening is disposed to one side of the iron so that the handle will not obstruct the view of the indicating wire 24.

It will be seen that when the current is turned on the current will flow through the indicating wire 24 which is looped beneath the glass disk 17 and a flow of current through the wire will cause it to get red' hot and thus it is easily observed whether or not the current is on. The wire 24 will glow just so long as the current is turned on, as it is in series with the source of current and the heating element. As soon as the current is turned off the wire will get and black, thus indicating the current is turned off. All danger of the wire 24 burning out is reduced to a minimum as when the heating element gets hot, it will naturally increase in resistance and therefore less current will be allowed to pass through the wire 24. The advantage of placing this indicating wire in series with the heating element and the source of current is that if the heating element or the conductor leading into the iron should be open it will not indicate. It is to be understood of course that I do not wish to limit myself to any particular form of heating element and that many' minor modifications may be made in the-detailed construction of this device without de arting from the s irit of the invention as de ed in the appen ed claims. c

Having described my invention what I claim is:

1. An electrically'heated flat iron including a bod having an electrically energized heating e ement, a casing extending over said body and detachably engaged therewith, the casing atone point being provided with a sight opening, binding posts projecting from the casing, and an indicating unit, comprising an indicating high resistance cold wire, a supporting member having a transparent pane, insulating blocks, binding screws connected to the insulating blocks and engaging said indicating resistance wire, means detachably supporting said umt ,with its transparent pane and indicating wire beneath. the sight opening of the cas- Y ing, and electrical connections between the binding post and one of said binding screws and between the other of said binding screws and the heatin element, the. unit being romovable from e casing as a whole.

2. An electrically heated flat iron including a base, a heatin element disposed in conjunction with the ase, a casing attached to the base and inclosing the heati element, lead wires entering the casing, e top of the casing being formed with a opening, a flanged annulus disposed wit the casing and projecting upward throu'h the opening. a disk of glass supported wi in the annulus, refractory insulating blocks disposed beneath the annulus, screws through the casing and into the insulati blocks, bind' screws mounted on sai 3 blocks, one of e lead being connectui to-one bind ng screw, a wire hav ng electrical resistance connected to said binding screws andiextending beneath said siggt opening and formed to provide a loo neath the sight opening, and electrica connections from the other of said binding screws to the heating element and from the heating elementto the other of said lead 'wires.

In testimony whereof I hereunto afiix my signature in the presence of two witnesses.

- EDWARD L. GLASS.

Witnems:

JiiNm JORDAN,

Eva Nntmonrm. I 

